From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F10D7C433E1 for ; Mon, 29 Mar 2021 16:23:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CE9306192E for ; Mon, 29 Mar 2021 16:23:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231218AbhC2QX3 (ORCPT ); Mon, 29 Mar 2021 12:23:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41950 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231145AbhC2QXW (ORCPT ); Mon, 29 Mar 2021 12:23:22 -0400 Received: from mail-wm1-x32c.google.com (mail-wm1-x32c.google.com [IPv6:2a00:1450:4864:20::32c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A15CC061574 for ; Mon, 29 Mar 2021 09:23:22 -0700 (PDT) Received: by mail-wm1-x32c.google.com with SMTP id y124-20020a1c32820000b029010c93864955so8805976wmy.5 for ; Mon, 29 Mar 2021 09:23:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=KPclp6vfsh1l0llxq/9bcQXpgR0clJ6jmS6dVL/hig8=; b=bj77tl0OjsgCgZLbOb3u3k145orUo71nkMcisB/6plOzX/M2mg3Z4Yb5uDisu9c4pB Y53SOJe4s4v6Mhp+CFbq6aMAtV0YnUliuYDu7EDJkfI1uYn+lEi44BJeUdxqKS/tx3ru OfU2m9joLw9o3CyDSRJhRXWyX6CADErtPac4qLPNqMsBYAMl4Ls7CdOHxBs62aYJ4XaJ yUgTz5aupJxIno4XKcDiaBivqeoEJ6rRqOkSeKzkD+lCKQV3ESKONlrbQU0ZLjQ3/915 /Mff3SI799c/P5lsfxlGS62u7OScJZG9l13uwvkzhwn9CM6+aup1yF/Jf4SM0qj4lLMj WW+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=KPclp6vfsh1l0llxq/9bcQXpgR0clJ6jmS6dVL/hig8=; b=A2NrdyyKOiFaE7RWbNbGH6YFJ8aED7zPkEjgc+VgBKhcG2l+BuPL30ZEvr+z+6VAfn OZsEsZxPVF8wr5HT+PYG8+GYp7VX1GdWvvnyze8SYcCbdORmZRjJtBbuUv/QuZk85cTT KdyZn4pFe11L6hMEP+nPBKmQ2wrKkRPp0v9el+SBU8x/V3gAdMifbUxlbflQHkNiRbUs XUVST6gP0Li5TyoYTsa4UozJg00tNQkc8f1AXs5YkxDHJftnUbYCqGTGryKTPAR/68qv RfZVKIvvq/qL/B6ycZGaIroabTMFpLPZ2vFvcrHdB18D8hAAN5kkcy+m3O5W9H6Dq3Hk nlPA== X-Gm-Message-State: AOAM5315G5M646rweYmXjUz+RSvsYioJOnh0AHbHInm84aO1+6zXF9Y9 Kjo7ckM+nUho66K42OvmidIyuA== X-Google-Smtp-Source: ABdhPJwFilW/ot1hZMhT/JWnG2uNUr6y5QBKqC9sEGMBX6tvcW+gfCS/ourdvz2bsJ56tuVkYTAQEw== X-Received: by 2002:a7b:c2f7:: with SMTP id e23mr26138332wmk.30.1617035001094; Mon, 29 Mar 2021 09:23:21 -0700 (PDT) Received: from myrica ([2001:1715:4e26:a7e0:116c:c27a:3e7f:5eaf]) by smtp.gmail.com with ESMTPSA id i8sm29594538wrx.43.2021.03.29.09.23.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Mar 2021 09:23:20 -0700 (PDT) Date: Mon, 29 Mar 2021 18:23:02 +0200 From: Jean-Philippe Brucker To: Vivek Kumar Gautam Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org, joro@8bytes.org, will.deacon@arm.com, mst@redhat.com, robin.murphy@arm.com, eric.auger@redhat.com, alex.williamson@redhat.com, kevin.tian@intel.com, jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com, lorenzo.pieralisi@arm.com, shameerali.kolothum.thodi@huawei.com Subject: Re: [PATCH RFC v1 15/15] iommu/virtio: Update fault type and reason info for viommu fault Message-ID: References: <20210115121342.15093-1-vivek.gautam@arm.com> <20210115121342.15093-16-vivek.gautam@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-TUID: vOigyBwZv6w+ Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 12, 2021 at 06:39:05PM +0530, Vivek Kumar Gautam wrote: > To complete the page request we would also need to send the response back to > the host from virtio backend when handling page request. So the virtio > command should also be accompanied with a vfio api to send the page request > response back to the host. Isn't it? > This is where the host smmuv3 can send PRI_RESP command to the device to > complete the page fault. It looks like Eric already has this in the VFIO series: https://lore.kernel.org/linux-iommu/20210223210625.604517-14-eric.auger@redhat.com/ Thanks, Jean